All three designs you mention WILL do snap rolls if they are set up to do them.
Kadet LT-40, Ultra Stick 40, Pulse XT 60)
It requires moving the balance point back and increasing the throws. The great thing about all three designs is with a constant chord wing, you can fly very aggressive without the airplanes trying to bite you. They take a very pro-snap control input to do the maneuver.